In an action fight against his fiercest pro opponent yet, Jose Ramirez rose to the occasion and claimed a vacant junior welterweight belt Saturday night, outpointing Amir Imam by unanimous decision in the Top Rank ESPN main event.

Oleksandr "The Nail" Gvozdyk spent most of the fight with Mehdi Amar nailing him with an assortment of combinations to claim a vacant interim light heavyweight world title, and Michael Conlan scored an impressive KO victory to stay unbeaten.

Bob Arum and Don King, the most prominent promoters in boxing history, have butted heads for decades. But they are friendly rivals these days and enjoy talking over old times and telling their war stories.

Floyd Mayweather says he will begin training "soon" for a transition into mixed martial arts and that he already has been in contact with UFC welterweight champion Tyron Woodley about working together in the near future.

Gennady Golovkin was in disbelief when Canelo Alvarez tested positive for a banned substance. Along with Golovkin's trainer, Abel Sanchez, they used the word "disappointment," not about Alvarez, but his team.

Golden Boy and Top Rank have signed a deal for Jorge Linares to defend his 135-pound crown against Vasyl Lomachenko, who will move up from 130 pounds, on May 12 at Madison Square Garden in New York, sources said.